sfc: expose CTPIO stats on NICs that support them

While the Linux driver doesn't use CTPIO ('cut-through programmed I/O'),
 other drivers on the same port might, so if we're responsible for
 reporting per-port stats we need to include the CTPIO stats.
Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/ef10.c

@@ -1649,6 +1649,23 @@ static const struct efx_hw_stat_desc efx_ef10_stat_desc[EF10_STAT_COUNT] = {
 	EF10_DMA_STAT(fec_corrected_symbols_lane1, FEC_CORRECTED_SYMBOLS_LANE1),
 	EF10_DMA_STAT(fec_corrected_symbols_lane2, FEC_CORRECTED_SYMBOLS_LANE2),
 	EF10_DMA_STAT(fec_corrected_symbols_lane3, FEC_CORRECTED_SYMBOLS_LANE3),
+	EF10_DMA_STAT(ctpio_dmabuf_start, CTPIO_DMABUF_START),
+	EF10_DMA_STAT(ctpio_vi_busy_fallback, CTPIO_VI_BUSY_FALLBACK),
+	EF10_DMA_STAT(ctpio_long_write_success, CTPIO_LONG_WRITE_SUCCESS),
+	EF10_DMA_STAT(ctpio_missing_dbell_fail, CTPIO_MISSING_DBELL_FAIL),
+	EF10_DMA_STAT(ctpio_overflow_fail, CTPIO_OVERFLOW_FAIL),
+	EF10_DMA_STAT(ctpio_underflow_fail, CTPIO_UNDERFLOW_FAIL),
+	EF10_DMA_STAT(ctpio_timeout_fail, CTPIO_TIMEOUT_FAIL),
+	EF10_DMA_STAT(ctpio_noncontig_wr_fail, CTPIO_NONCONTIG_WR_FAIL),
+	EF10_DMA_STAT(ctpio_frm_clobber_fail, CTPIO_FRM_CLOBBER_FAIL),
+	EF10_DMA_STAT(ctpio_invalid_wr_fail, CTPIO_INVALID_WR_FAIL),
+	EF10_DMA_STAT(ctpio_vi_clobber_fallback, CTPIO_VI_CLOBBER_FALLBACK),
+	EF10_DMA_STAT(ctpio_unqualified_fallback, CTPIO_UNQUALIFIED_FALLBACK),
+	EF10_DMA_STAT(ctpio_runt_fallback, CTPIO_RUNT_FALLBACK),
+	EF10_DMA_STAT(ctpio_success, CTPIO_SUCCESS),
+	EF10_DMA_STAT(ctpio_fallback, CTPIO_FALLBACK),
+	EF10_DMA_STAT(ctpio_poison, CTPIO_POISON),
+	EF10_DMA_STAT(ctpio_erase, CTPIO_ERASE),
 };
 
 #define HUNT_COMMON_STAT_MASK ((1ULL << EF10_STAT_port_tx_bytes) |	\
@@ -1737,6 +1754,30 @@ static const struct efx_hw_stat_desc efx_ef10_stat_desc[EF10_STAT_COUNT] = {
 	(1ULL << (EF10_STAT_fec_corrected_symbols_lane2 - 64)) |	\
 	(1ULL << (EF10_STAT_fec_corrected_symbols_lane3 - 64)))
 
+/* These statistics are only provided if the NIC supports MC_CMD_MAC_STATS_V3,
+ * indicated by returning a value >= MC_CMD_MAC_NSTATS_V3 in
+ * MC_CMD_GET_CAPABILITIES_V4_OUT_MAC_STATS_NUM_STATS.
+ * These bits are in the second u64 of the raw mask.
+ */
+#define EF10_CTPIO_STAT_MASK (						\
+	(1ULL << (EF10_STAT_ctpio_dmabuf_start - 64)) |			\
+	(1ULL << (EF10_STAT_ctpio_vi_busy_fallback - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_long_write_success - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_missing_dbell_fail - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_overflow_fail - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_underflow_fail - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_timeout_fail - 64)) |			\
+	(1ULL << (EF10_STAT_ctpio_noncontig_wr_fail - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_frm_clobber_fail - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_invalid_wr_fail - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_vi_clobber_fallback - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_unqualified_fallback - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_runt_fallback - 64)) |		\
+	(1ULL << (EF10_STAT_ctpio_success - 64)) |			\
+	(1ULL << (EF10_STAT_ctpio_fallback - 64)) |			\
+	(1ULL << (EF10_STAT_ctpio_poison - 64)) |			\
+	(1ULL << (EF10_STAT_ctpio_erase - 64)))
+
 static u64 efx_ef10_raw_stat_mask(struct efx_nic *efx)
 {
 	u64 raw_mask = HUNT_COMMON_STAT_MASK;
@@ -1783,6 +1824,15 @@ static void efx_ef10_get_stat_mask(struct efx_nic *efx, unsigned long *mask)
 	if (efx->num_mac_stats >= MC_CMD_MAC_NSTATS_V2)
 		raw_mask[1] |= EF10_FEC_STAT_MASK;
 
+	/* CTPIO stats appear in V3. Only show them on devices that actually
+	 * support CTPIO. Although this driver doesn't use CTPIO others might,
+	 * and we may be reporting the stats for the underlying port.
+	 */
+	if (efx->num_mac_stats >= MC_CMD_MAC_NSTATS_V3 &&
+	    (nic_data->datapath_caps2 &
+	     (1 << MC_CMD_GET_CAPABILITIES_V4_OUT_CTPIO_LBN)))
+		raw_mask[1] |= EF10_CTPIO_STAT_MASK;
+
 #if BITS_PER_LONG == 64
 	BUILD_BUG_ON(BITS_TO_LONGS(EF10_STAT_COUNT) != 2);
 	mask[0] = raw_mask[0];

drivers/net/ethernet/sfc/nic.h

@@ -332,6 +332,23 @@ enum {
 	EF10_STAT_fec_corrected_symbols_lane1,
 	EF10_STAT_fec_corrected_symbols_lane2,
 	EF10_STAT_fec_corrected_symbols_lane3,
+	EF10_STAT_ctpio_dmabuf_start,
+	EF10_STAT_ctpio_vi_busy_fallback,
+	EF10_STAT_ctpio_long_write_success,
+	EF10_STAT_ctpio_missing_dbell_fail,
+	EF10_STAT_ctpio_overflow_fail,
+	EF10_STAT_ctpio_underflow_fail,
+	EF10_STAT_ctpio_timeout_fail,
+	EF10_STAT_ctpio_noncontig_wr_fail,
+	EF10_STAT_ctpio_frm_clobber_fail,
+	EF10_STAT_ctpio_invalid_wr_fail,
+	EF10_STAT_ctpio_vi_clobber_fallback,
+	EF10_STAT_ctpio_unqualified_fallback,
+	EF10_STAT_ctpio_runt_fallback,
+	EF10_STAT_ctpio_success,
+	EF10_STAT_ctpio_fallback,
+	EF10_STAT_ctpio_poison,
+	EF10_STAT_ctpio_erase,
 	EF10_STAT_COUNT
 };